Grinding-machine.



P. E. BRIGHTMAN.

GRINDING MACHINE APPLICATION FILED 11110.26, 1.913.

Patented Nov. 10, 1914.

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777'TOE/VEY6 F. E. BRIGHEHAN. GRINDING MACHINE. APPLIUATION FILED DEG. 26. 1913. 1,1 16,557. Patented N0 v.10,1914.

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WW q M 1 mm/ ,9 0 m "n13 STAJFES PATENT neuron FRANK IE. BRIGH'IMAN, 01? SANIDUSKY, OHIO, ASSIGNOR T0 E. L. MARSH, 0F SANIDUSKY, OHIO.

GRINDING-MACHINE.

To all whom it may concern.-

Be it known that I, FRANK E. BRIGHT- MAN, a citizen of the United States, and a resident of Sandusky, county of Erie, and State of Ohio, have invented a new and useful Improvement in Grinding-Machines, of which the following is a specification, the principle of the invention being herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

The present invention relates to the class of machines designed for grinding or polishing a plurality of similar articles in succession, and its general object is the provision of an eficiently operative machine for grinding or polishing the several fiat faces of nuts or similar articles.

To the accomplishment of these and related ends said invention then consists of the means hereinafter fully described and particularly pointed out in the claims.

The anucved :l" gs and the following description set forth in detail certain mech anism embodying the invention, such disclosed mearfs constituting. however, but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawings :Figure 1 is an elevational View of a machine embodying the invention, certain parts being shown in section, certain parts being broken, and certain parts being omitted; Fig. 2 is a plan view of a series of grinding devices forming part of the invention; Fig. 3 is a longitudinal section of one of the grinding devices, certain parts being shown in elevation, and certain parts being broken; Fig. 4: is a section on the line H in Fig. 3; and Fig. 5 is a broken transverse section of two guide fingers with a nut between them.

The general frame of the machine as illustrated comprises a base 1 with uprights 2 supporting a platform 3. The several grinding devices are supported from the base 1 on pedestals l, 5 and 6 of different heights, but the mounting of each device in its pedestal isthe same and so it will suiiice to describe in detail the mounting of'one of the grinding devices in one of the lowest pedestals t. A standard i is bolted on the pedestal and supports clamp member 8 formed as the part of a cylinder and threaded'on its interior surface; a cylindrical hearing block 9 rests on clamp member 8 and 1s Specification of Letters Patent.

Patented Nov. 10, 1914.

Application filed December 26, 1913. Serial No. 808,677.

formed exteriorly with a thread engaging the thread of the member 8; a partly cylindrical, interiorly threaded clamp member 10 15 disposed above the bearing block 9 and a clamp 11 bears upon the member 10 and is removably secured to the standard 7 by bolts A shaft 12 is mounted in the bearing block 9 on antifriction bearings 13 and bears at its outer end a pulley 1'4 which may be rotated by a belt 15 driven from any suitable power shaft. At the inner end of the shaft 12 a grinder 16 is secured by a clamp 17 and the grinder is cylindrical and hollow so that it may be described as cup-shaped. A cylindrical guard 18 surrounds the grinder 16 and is secured to the pedestal by bolts 19, and a guide finger 21 is secured to guard 18 by bolts 22 extending through transverse slots 20.

In assembled condition the several grinders are angularly arranged with relation to each other so that each of them will contact with one of the faces of the article to be ground, and the several guide fingers are arranged to contact with certain faces of the article to be ground so that they will properly guide the article between the rinders.

The drawings illustrate a machine de signed to grind the siX faces of a hexagonal nut. To this end the grinders are arranged in three pairs supported one pair below anare so positioned that the axes of each pair of grinders will be disposed at an angle'of substantially sixty degrees with respect to the axes of the other two pairs. The cuprim 23 of each grinder constitutes its grinding face and the axes of the two grinders in the respective pairs are parallel and so one side of the rim of one grinder lies opposite and parallel with the face 28 of the opposite side of the rim of the other rinder,

the two grinders being rotated in t e same direction. The two fingers 21, one of which is bolted to the face of each casing in a pair,

are formed with V-shaped faces 2% with a slot 25 at the apex, and they are so positioned that they will contact with four sides of the nut :26 to be ground and leave two op- I posite sides free to be acted upon by the two grinders in the pair. A chute 27 leads to the hexagonal space defined by the series of grinders and fingers. A hopper 28 is Sli5 e I. ported on" the platform "3 and 'it'is rotate other and the several supporting pedestals spaced from each other that the face 23 of y on a horizontal axis preferably by means of a gear 29 and a worm 3O driven from pulley 31. The discharge end of the hopper opens into the chute 27 in the plane of one side of the chute and in the plane of the other side of the chute is a fixed disk 32. A forced feed for feeding the nuts through the grinding devices may be provided by a punch 33 alined with the space defined by the grinders and fingers, the punch being normally pressed upwardly by a spring 34: and being periodically thrust downwardly by a cam 35 on the shaft of pulley 31.

In operation nuts may be shoveled into the hopper and by its rotation the nuts will be fed down to the chute against the disk and continued rotation of the hopper will j ostle the nuts into proper position in the chute and will feed a succession of nuts through the chute. As the nuts reach the vertical space they will descend through that space and they may be forced positively therethrough by the punch. The nuts pass from the chute directly and immediately into the space between the two fingers of the uppermost pair and are thereby held from movement except vertically downward and this movement brings them. to the grinders of the uppermost pair whose action, as the nut continually passes downward, completes the grinding of two opposite faces of the nut.

11 its continued descent the nut passes directly and immediately from the fingers of the uppermost pair to the succeeding pair of fingers which are set at an angle of approximately sixty degrees with respect to the uppermost fingers. These fingers embrace those sides of the nut which have been ground and the respective adjacent sides and the grinders of the second pair then grind the remaining two faces. In its continued descent the nut then passes directly and immediately from the fingers of the middle pair to the fingers of the lowermost pair and since these are set at an angle of approximately sixty degrees with respect to the uppermost and middle pairs of fingers they contact with the four previously ground faces of the nut and the remaining two faces are ground by the grinders of the lowermost pair, after which it'is discharged from the machine.

' In order to compensate for wear of the faces of the grinders, or=in order to space the opposite grinders of each pair to operate upon'nuts of a different size than those previously operated upon, the several grinders may be axially adjusted by loosening the clamp bolts 36, threading the hearing block oneway or the other through the clamp members and then tightening the clamp bolts again. When changing the machine to operate upon a different sized nut the two guide fingers in each pair may be moved toward or from each other by loosening the bolts 22, the bolts passing through horizontal slots 20 so that the fingers may be moved in or out. At the same time the plate 32 may be moved toward or from the hopper 28 as the case may be, the platebeing mounted in any suitable manner to provide for this adjustment.

It is obvious that the invention provides a machine which is not necessarily confined to the grinding of hexagonal nuts, for its parts may be equally well arranged to grind the faces of any fiat sided nut irrespective of the number of sides.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my invention:'-

1. In a machine of the class described, the combination of a plurality of pairs of rotatable grinders, the faces of the grinders in each pair being parallel and the faces of the grinders of the respective pairs being angu larly disposed relatively to each other, the planes of the faces of the several grinders defining a space conforming cross-sectionally with the article to be ground, whereby the several faces will contact with the respective faces of the article to be ground.

2. In a machine of the class described, the combination of a plurality of pairs of 1'0 tatable grinders disposed one beyond another, the faces of the grinders in eachpair being parallel, and the faces of the grinders of the respectivepairs being angularly disposed relatively to each other; and means for guiding articles through the space defined by the planes of the several faces.

3. In a machine of the class described, the combination of three pairs of rotatable grinders disposed one below another, the axes of each pair being arranged at-an angle of approximately sixty degrees relatively to the axes of the other pairs, the faces of the grinders in each pair being paralleland the planes of the faces of the grinders in the respective pairs intersecting; and means for riding articles through the space defined by the several planes.

4. In a machine of the class described, the combination of a plurality of pairs of rotatable, axially adjustable, cup-shaped grinders, the axes in each pair being parallel and the axes of the respective pairs being relatively angularly arranged, the faces of the cup-rims in each pair being parallel and the planes of the faces of the cup-rims of themspective pairs intersecting; means for feeding articles to the space defined hy the several planes; and means for articles through such space;

5. In a machine of the class described, the combination of a plurality of pairs of rotatable grinders, the faces of the grinders in each pair being parallel, and the lanes of the faces of the several grinders efining a space conforming cross-sectionall with the article to be ground; a chute lea ing to the defined space; a hopper rotatable on a hori zontal axis and opening into the chute at one side thereof; a plate at the other side of the chute opposite the hopper; a reciprocable punch adapted to force articles through the defined space; and a plurality of fingers arranged to guide articles through the defined space.

6. In a machine of the class described, the combination of a plurality of pairs of rotatable, axially adjustable, cup-shaped grinders, the axes in each pair being parallel and the axes of the respective pairs being- -rela- 20 tively angularly arranged, the faces of the cup-rims in each pair being parallel and the planes of the faces of the cup-rims of the respective pairs intersecting; a plurality of cylindrical guards surrounding the respective grinders; a plurality of ide fingers secured to the respective guards the planes of the guiding faces of the fingers defining a space conforming cross-sectionally with the article to be ground; means for adjusting the several fingers transversely of the respective grinders axes; and means for feeding articles to the defined space.

Signed by me this 19th day of Dec, 1913.

FRANK E. BRIGHTMAN. Attested by H. B. F AY; MARY GLADWELL. 

